package week2;

public class q2 {
    public static void main(String[] args) {
        double pi=3.14;
        System.out.println("半径为1.2的圆的半径:"+pi*1.2*1.2);
        System.out.println("半径为2.5的圆的半径:"+pi*2.5*2.5);
        System.out.println("半径为6的圆的半径:"+pi*6*6);
    }
}
